In this election there won't be any % barrier in some countries, but I still haven't seen any poll numbers for small parties here in Germany for example. Everything below 2-3% gets lumped in with "Others" as usual, even though about 0.5% would already get them a seat in parliament this time. This makes voting strategically very difficult, because we have no idea whether any small party could even get in.
I get that there are limits to what you can show in a graphic, but even the source links I checked didn't provide more details. Why is that, and has anyone seen poll numbers for small parties, particularly for Germany?
The problem is that small vote shares in a survey are not reliably measured when you consider measurement uncertainty. It makes sense to not include very low shares to avoid an unwarranted impression of accuracy.
That's the right answer. I couldn't find a poll that explicitly states it on my quick search, but if I am not mistaken I saw a poll in TV lately that showed an uncertainty of about 2-3%. It just makes no sense to list parties that are below that value.
With sample sizes in range of ~1000 that are usually used for polling (at least here) you get margin of error that's bigger than support of such small parties individually. You could get this data but it wouldn't be very meaningful.
I would say for whether or not your vote really counts it doesn't matter if the party has 20.5% or 0.5%. Each vote counts the same towards the next seat, which may be the first or the twentieth. So I would encourage everyone to vote small parties (except for the crazy ones).
I’m not sure how the apportionment of remaining seats is performed in Germany and whether it’s a EU standard or up to the states, but in NL you need at least one full seat to be eligible for additional ones based on fractional seats.
In Germany, you can get a seat with less than 1%. In the last election, ÖDP got one with 0.6%. Not an expert on the electoral system, but I'd guess it's because Germany has more seats in the first place.